ITU-T Q.120-Q.139 FRENCH PDF

Name:
ITU-T Q.120-Q.139 FRENCH PDF

Published Date:
11/01/1988

Status:
[ Active ]

Description:

Spécifications du système de signalisation n° 4

Document status:

Active

Format:

Electronic (PDF)

Delivery time:

10 minutes

Delivery time (for Russian version):

200 business days

SKU:

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